Jore2gtfs is a simple python script that converts stop information from HSL Joukkoliikennerekisteri to a GTFS formatted CSV for use e.g. with OpenTripPlanner.
You can find data dumps from jore here. Place the pysakki.dat and terminaali.dat files in the same folder as jore2gtfs.py. Run the script and it will produce a properly formatted stops.txt.